There have been numerous threads on producing books, and on getting them published. One I particularly enjoyed is at The Writers Life, although for some reason it's tagged with "This Thread is Closed." (Anyone know why?) Some other threads have dealt more directly with the specific mechanics of submitting for publication, but I don't have one handy.

The illustrations at your site look quite nice to me, and perfectly appropriate to the tales. (I didn't look at all of them.) As was mentioned, publishers often prefer to get their own artists; but this does vary. If you have contact with a publisher who's interested it would be well to check with them on whether they want you to submit art work before doing a lot of preparation. (You may have already done this?)

John